EMC1412-1-AC3-TR SMSC, EMC1412-1-AC3-TR Datasheet - Page 19

• Manufacturer Part Number: EMC1412-1-AC3-TR
• Description: Board Mount Temperature Sensors Temp Sensor w/ Beta Comp & Select
• Manufacturer: SMSC

Specifications of EMC1412-1-AC3-TR

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Multiple Channel 1°C Temperature Sensor with Beta Compensation
Datasheet
SMSC EMC1412
6.1.2
6.2
CONVERSION RATE
4 / sec (default)
1 / 16 sec
1 / 8 sec
1 / 4 sec
1 / 2 sec
16 / sec
32 / sec
64 / sec
1 / sec
2 / sec
8 / sec
Dynamic Averaging
Dynamic averaging causes the EMC1412 to measure the external diode channels for an extended time
based on the selected conversion rate. This functionality can be disabled for increased power savings
at the lower conversion rates (see
enabled, the device will automatically adjust the sampling and measurement time for the external diode
channels. This allows the device to average 2x or 16x longer than the normal 11 bit operation
(nominally 21ms per channel) while still maintaining the selected conversion rate. The benefits of
dynamic averaging are improved noise rejection due to the longer integration time as well as less
random variation of the temperature measurement.
When enabled, the dynamic averaging applies when a one-shot command is issued. The device will
perform the desired averaging during the one-shot operation according to the selected conversion rate.
When enabled, the dynamic averaging will affect the average supply current based on the chosen
conversion rate as shown in
The THERM output is asserted independently of the ALERT output and cannot be masked. Whenever
any of the measured temperatures exceed the user programmed THERM Limit values for the
programmed number of consecutive measurements, the THERM output is asserted. Once it has been
asserted, it will remain asserted until all measured temperatures drop below the THERM Limit minus
the THERM Hysteresis (also programmable).
When the THERM pin is asserted, the Therm status bits will likewise be set. Reading these bits will
not clear them until the THERM pin is deasserted. Once the THERM pin is deasserted, the THERM
status bits will be automatically cleared.
THERM Output
Table 6.1 Supply Current vs. Conversion Rate for EMC1412
(DEFAULT)
ENABLED
AVERAGE SUPPLY CURRENT
1010uA
1020uA
1050uA
1100uA
660uA
660uA
660uA
660uA
660uA
930uA
950uA
Table 6.1
DATASHEET
Section 7.4, "Configuration
.
19
DISABLED
1050uA
1100uA
430uA
430uA
475uA
510uA
630uA
775uA
430uA
430uA
430uA
Register"). When dynamic averaging is
AVERAGING FACTOR (BASED ON
(DEFAULT)
ENABLED
0.5x
16x
16x
16x
16x
16x
16x
11-BIT OPERATION)
8x
4x
2x
1x
Revision 1.38 (10-25-10)
DISABLED
0.5x
1x
1x
1x
1x
1x
1x
1x
1x
1x
1x